This is the 7407th most frequent Korean word.
청두
"청두" refers to Chengdu, the capital city of Sichuan Province in China.
Here, '청두' refers to the city Chengdu in China, used as a proper noun.
나는 청두에 가고 싶어요.
I want to go to Chengdu.
'청두' in this sentence is again referring to Chengdu, describing the people from there, showing an attributive usage.
청두 사람들은 친절해요.
People from Chengdu are kind.
In this sentence, '청두' represents the city Chengdu and its characteristic association.